[sage-support] Re: Calculating with homology classes, getting coordinates

Thanks for your speedy reply, John! I have a follow-up question. For some cycle representing a homology class, is there a function that expresses it as a linear combination of the basis in the CohomologyRing? The reason I'm interested in this is that I have a group acting on my space and want

[sage-support] Re: win 10, virtualbox 5.1.4, sage 7.3

Hello, Thanks for your hints. But now it works also with ova on win 10: - Newest VirtualBox 5.1.6 - Sage.ova 7.3 - Instructions according to -- https://ask.sagemath.org/question/32344/vm-virtualbox-sage-70ova-how-to-start/ That works well. Don´t know if it matters: I increased ram of the